Kia Optima Hybrid: Automatic Transaxle Control System / Input Speed Sensor Repair procedures

Inspection
1.
Check signal waveform of Input & output speed sensor using the GDS.

Specification: Refer to "Signal Wave Form" section.

Removal
   
Be sure to read and follow the “General Safety Information and Caution” before doing any work related with the high voltage system. Failure to follow the safety instructions may result in serious electrical injuries.
Be sure to shut off the high voltage circuit according to the “High Voltage Shut-off Procedures” before doing any work related with the high voltage system to avoid serious electrical injuries.
1.
Remove the valve body assembly.
(Refer to Hydraulic System - "Valve Body")
2.
Disconnect the input & output speed sensor connector (A).
3.
Remove the input & output speed sensor (B) after removing the bolts.

Tightening torque:
9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)

Installation
1.
Install in the reverse order of removal.
   
Do not reuse the drain plug gasket and the valve body cover gasket, oil cooler tube washer.
Perform the procedures below after installing
1)
Refill the automatic transaxle with fluid.
(Refer to Hydraulic System - "Fluid")
2)
Refill the engine & transaxle cooling system with coolant.
(Refer to Engine Mechanical System - "Coolant")
3)
Refill the hybrid motor cooling system with coolant and then perform the air bleeding using the GDS.
(Refer to Hybrid Motor System - "Coolant")
4)
Reset the automatic transaxle adaptive values using the GDS.
5)
Confirm the coolant leak or fluid leak from the hose connections part in state of engine start.
Input Speed Sensor Troubleshooting

Signal Waveform ...

Output Speed Sensor Description and Operation

Description Input speed sensor is a vital unit that measures the rate of rotation of the input shaft inside the transaxle and delivers the readings to the TCM. The sensor provides critical input data that''s ...

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